A fisheye lens is a type of wide-angle lens that has a very strong perspective and can distort straight lines into curves.
A wide-angle lens is also known as a short lens. A wide-angle lens is a focal length shorter than the standard lens, perspective greater than the standard lens, a focal length longer than the fisheye lens, perspective smaller than the fisheye lens photographic lens wide-angle lens.
The lens is an extremely important part of the CCTV system, usually seen as the camera CCD optical coupling into the imaging device inseparable from the right hand.
In recent years, the optical lens industry has shown a series of development characteristics, mainly as follows.